Machine for molding artificial stone.



Patented .Ine 24, |902. N. F. PALMER.

(Application led Mar. 11, 1962.)

No. 703,08l.

MACHINE FOR HOLDING ARTIFICIAL STOIIE.

(No Model.)

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MACHINE FOB HOLDING ARTIFICIAL STONE.

(Anplication filed Mar. 11, 1902.)

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(No Model.)

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m.- 7os,oa|.. Patented :une 24, |902.

N. F. PALMER.. MACHINE FOR HOLDING ARTIFICIAL STONE.

(Application filed Mar. 11, 1902.) (No Model.) 3 Sheets-Sheet 3,

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NOYES F. PALMER, OF BROOKLYN, NEW YORK.

MACHINE FOR IVIOLDING ARTIFICIAL STONE.

SPECIFICATION forming part of Letters Patent No. 703,081, dated June 24, 19052.V Application filed March 11, 1902. Serial No. 97.684. (No model.)

To al?, 1.071.017?, it nwtg/ concern:

Be it known that I, NOYES F. PALMER, a citizen of the United States, and a resident ot' Brooklyn, county of Kings, and State of-New York, have invented certain new and useful Improvements in Machines for Molding Articial Stone, of which the following is a specitcat-ion.

This invention relates to a machine for molding artificial concrete building and paving blocks, the construction being such that by a simple adjustment a great variety of sizes and shapes may be produced upon one and the same machine.

In the accompanying drawings, Figure 1 is a side elevation of my improved machine for molding artificial stone; Fig. 2, a top view of the core-support; Fig. 3, a top View of the mold-box with the false bottom removed; Fig. 4, a vertical longitudinal section taken on line 4. 4, Fig. 3; Fig. 5, a cross-section on line 5 Fig. 3. Figs. and 7 are plans of the mold-box, showing different arrangements of cores and partitions; Fig. S, a vertical longitudinal section on line S 8, Fig. 6; and Figs. 9 to 13 are perspective views of different forms of building-blocks molded by the machine.

The letter d represents the frame of the machine, and d' is the base-plate that forms the bottom of the mold-box. The sides I) and ends c of the mold are sliding and may be moved inward-and outward along the baseplate, so as to open and close the mold. This movement is effected by a shaft d, bevel-gear d', and racks b c, such construction, however, not forming part of the present invention.

The base-plate a has a central opening adapted to accommodate a plate e, that constitutes the support for cores f. These cores are sliding and are so connected to the support e that they may he clamped thereto in any one of a large number of positions. By thus shifting theV cores, altering their relative position, or using cores of different configurations or size I may mold a large Variety of differently-shaped blocks by one and the same machine.

To eect the adjustment of the cores fupon the support e, the latter is provided with a number of longitudinal slots e', arranged, preferably, in a parallel direction, Fig. 2. Through these slots pass screws g, which carry washers g and are tapped into the cores. By tightening up the screws the washers are pressed against the bottom of the support e to clamp the cores in place. By slackening the screws the cores arc released and maybe readily shifted and set to a new position.

I prefer to subdivide each single core into two or more separable sections, so that by a different relative arrangement of the sections a variety of different designs may be obtained. Thus in Fig. 3 the left-hand core is formed of two semi-oval sections, the central core of two semicircular sections, and the right-hand core of one oblong section and two flanking semicircular sections. In like manner the arrangements may be multiplied to change the form, size, and location of any or all the perforations or concavities of the block.

My construction of movable sectional cores also permits the simultaneous molding of a number of smaller blocks in lieu of a single large block. It small blocks are to be thus molded, the sections of the coreare spread sufficient for the introduction between them of partitions or plates h.` These partitions are sustained in an upright position by the core-sections themselves,which should, however, be so spaced that the partitions may be withdrawn from between them in a vertical direction. The partitions may be arranged either longitudinally or transversely and are of a length to project beyond the support e and across the mold-bottom'd upto the sides I) or ends c. In Fig. G I have shownia longitudinally-arranged partition, the necessary lateral separation ot 'the core-sections being rendered possible by the width of the slots e'. With this adjustment I mold blocks Aof the form shown in Figs. 9 and lO. In Fig. 7 are shown three transversely-arranged partitions. With this adjustment are molded four oblong blocks B, Fig. 12, and two blocks D of the form shown in Figs. 1l and 13. It is evident that in a similar manner an infinite variety of blocks may be produced.

The support eis preferably vertically movable, so that the cores may be withdrawn hy IOC being lowered out of the mold. This movement is effected by a shaft t', pinions t", and racks Upon the mold-bottom a is placed a false bottom j, which is perforated to accommodate the cores. The false bottom embraces the cores and covers the plate c around the cores, so as to close the exposed portions of the slots e and prevent the plastic mass from entering the same. The false bottom projects laterally beyond the support c, so that the free ends of the partitions 7L rest thereon, the size of the false bottom being equal to the size of the mold. The false bottom may be moved upward, so as to raise the finished block ont of the mold, the vertical movement being imparted to the false bottom from shaft through pinionsj and racks jg, that pass through openings a2 of base a.

In use the cores and partitions are set to the size and shape desired and then the concrete is tamped into the mold and struck off. The mold is opened and the false bottom is raised. Byraising the false bottom, together with the molded block, the partitions h are also raised off the support e and out of the Vcoresf, so that the latter may be lowered.

After the block has been lifted to clear the mold it is removed, together with the false bottom and partitions, and is allowed to set while the machine is readjusted to mold a fresh block.

l. In a machine for molding artificial stone, the combination of a mold with a slotted supporting-plate, a core, means for clamping the core to the plate, and a perforated false bottom which embraces the core and covers the slot beyond the core, substantially as specified.

2. In a machine for molding` artificial stone, the combination of a mold with a slotted supporting plate, a sectional core, means for clamping the core-sections to the plate, a partition between the core-sections, and a false bottom upon the plate, substantially as specified.

8. In a machine for molding artificialstone, the combination of a mold, with a verticallymovable core-support, a sectional core adjustably secured thereto, and a partition between the coresections,substantially as specified.

4. In a machine for moldingarticial stone, the combination of a mold, with a verticallymovable core-support, a sectional core adj ustably secured thereto, a laterallyextend ing partition between the core-sections, and a false bottom for supporting the free ends of the partition, substantially as specified.

Signed by meat NewYork city, New York, this 10th day of March, 1902.

NOYES F. PALMER. lVitnesses:

WILLIAM SCHULZ, F. v. BRIESEN. 

